Home / 99,820.20-137,749.86-57,377.64

Finding the Fourth Proportional to 99,820.20, 137,749.86 and 57,377.64

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Solution

The fourth proportional to 99,820.20, 137,749.86 and 57,377.64 is: 79,179.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,820.20 : 137,749.86 = 57,377.64 : x
  2. Step 2: Convert to fraction form
    99,820.20/137,749.86 = 57,377.64/x
  3. Step 3: Cross multiply
    99,820.20x = 137,749.86 × 57,377.64
  4. Step 4: Simplify right side
    99,820.20x = 7,903,761,877.13
  5. Step 5: Solve for x
    x = 7,903,761,877.13/99,820.20
  6. Step 6: Final answer
    x = 79,179.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.